Atmosphere Ocean Science Colloquium
Correlation and Causation
Speaker: George Sugihara, Scripps
Location: Warren Weaver Hall 1302
Date: Wednesday, April 15, 2015, 3:30 p.m.
While everyone knows Berkeley's 1710 dictum "correlation does not imply causation" few realize that the converse "causation does not imply correlation" is also true. This conundrum runs counter to deeply ingrained heuristic thinking that is at the basis of modern science. Ecosystems are particularly perverse on this issue by exhibiting mirage correlations that can continually cause us to rethink relationships we thought we understood. Here we examine a minimalist paradigm, empirical dynamics, and a method based on Taken's theorem that can distinguish causality from correlation in dynamic systems. It is a radically different empirical approach for leveraging time series information from complex systems of interacting parts (ecosystems). The approach is a departure from equilibrium-based classical theory and turns the apparent liability of complex nonlinear interconnections into and asset that allows real prediction.